K. Rurack et al., Unusually high cation-induced fluorescence enhancement of a structurally simple intrinsic fluoroionophore with a donor-acceptor-donor constitution, CHEM COMMUN, (5), 2000, pp. 407-408
Upon cation complexation, donor-acceptor-donor-substituted intrinsic fluoro
ionophore 3 shows red-shifted emission spectra accompanied by an extraordin
arily high fluorescence enhancement.